//下面我们有从BO对象继承的域对象，它有save和// update方法。
//
//在我们的UI中，我们希望能够在用户单击//保存按钮时执行以下操作。
//
//插入新对象时，此方法可正常工作。更新从数据库读取的//现有对象时，对象将被复制而不是//更新。
//
//不确定为什么SaveOrUpdate和Merge Nhibernate方法会破坏新的//对象而不是更新记录？
//
//保存方法是否无法告诉对象有密钥因此//更新而不是复制记录？
private void BtnSave_Click(object sender, EventArgs e)
{
if (person.PersonID > 0)
{
person.Update();
}
person.Save();
}
public class BO<T>
{
private ISessionFactory _sessionFactory;
private ISession _session;
public BO()
{
// CreateSession();
}
private void CreateSession()
{
string connectionString = "Data Source=(local)\\SQLExpress;Initial Catalog=c;Integrated Security=True;Pooling=true";
/*
Hibernate start session to read and write to MSSQL database
*/
if (_session != null && _session.IsOpen)
{
_session.Flush();
_session.Close();
}
if (_sessionFactory != null && !_sessionFactory.IsClosed)
{
_sessionFactory.Close();
}
//Create a new session from the session factory
_sessionFactory = CWISessionFactory.CreateFactory<Person>(connectionString);
_session = _sessionFactory.OpenSession();
}
public virtual void Update()
{
CreateSession();
using (ITransaction tran = _session.BeginTransaction())
{
bool isd = _session.IsDirty();
_session.SaveOrUpdate(this);
_session.Flush();
tran.Commit();
_session.Close();
_sessionFactory.Close();
}
}
public virtual void Save()
{
CreateSession();
{
using (ITransaction tran = _session.BeginTransaction())
{
bool isd = _session.IsDirty();
_session.Save(this);
CloseSession(tran);
}
}
}
private void CloseSession(ITransaction tran)
{
_session.Flush();
tran.Commit();
_session.Close();
_sessionFactory.Close();
}
private void CloseSession()
{
_session.Flush();
_session.Close();
_sessionFactory.Close();
}
public virtual ISession GetSession()
{
CreateSession();
return _session;
}
//Object collections can be retrieved from calling the method below.
public virtual ICollection<T> Collection()
{
IList<T> ilist = new List<T>();
CreateSession();
if (typeof(T) == typeof(Country))
{
ilist = _session.QueryOver<Country>().List<T>();
}
if (typeof(T) == typeof(Title))
{
ilist = _session.QueryOver<Title>().List<T>();
}
else if (typeof(T) == typeof(Role))
{
ilist = _session.QueryOver<Role>().List<T>();
}
else if (typeof(T) == typeof(Status))
{
ilist = _session.QueryOver<Status>().List<T>();
}
else if (typeof(T) == typeof(Gender))
{
ilist = _session.QueryOver<Gender>().List<T>();
}
CloseSession();
return ilist;
}
//Can search for an object using the method below
public virtual object GetObjectByKey(int key)
{
CreateSession();
object o = _session.Get<T>(key);
CloseSession();
return o;
}
}
//Business object currently not updating
public class Person : BO<Person>
{
public Person()
{
Title = new Title();
Gender = new Gender();
Role = new Role();
Status = new Status();
//this.Address = new Address();
}
public virtual int PersonID
{
get;
protected set;
}
public virtual string FirstName
{ get; set; }
public virtual string SecondName
{ get; set; }
public virtual string IDNumber
{ get; set; }
public virtual string Initials
{ get; set; }
public virtual string Surname
{ get; set; }
public virtual DateTime ? DateOfBirth
{ get; set; }
public virtual string HomeTelephone
{ get; set; }
public virtual string WorkTelephone
{ get; set;
}
public virtual int TitleID
{ get; set; }
public virtual string Email
{ get; set; }
public virtual string CellurPhoneNumber
{ get; set; }
public virtual string Password
{ get; set; }
public virtual int ? OccupationID
{ get; set; }
public virtual bool AcceptedMandate
{ get; set; }
public virtual int ? GenderID
{ get; set; }
public virtual string InvestmentAccountNumber
{ get; set; }
public virtual int ? StatusID
{
get;
set;
}
public virtual int? RoleID
{
get;
set;
}
public virtual int? AddressID
{
get;
set;
}
public virtual Title Title
{
get;
set;
}
public virtual Role Role
{
get;
set;
}
public virtual Status Status
{
get;
set;
}
public virtual Gender Gender
{
get;
set;
}
public virtual Int32 CountryOfPassportID
{
get;set;
}
public virtual DateTime? PassportExpiryDate
{
get; set;
}
public virtual string PassportNumber
{
get; set;
}
public virtual Country CountryOfPassport
{
get;set;
}
public virtual Address Address
{
get; set;
}
public override string ToString()
{
return Surname+" "+FirstName+" "+SecondName;
}
public virtual IList<Person> Search(string firstname, string surname)
{
var session = GetSession();
return session.CreateCriteria<Person>()
.Add(Expression.Sql("lower(FirstName) like lower(?)", "%"+firstname.ToLower()+"%", NHibernateUtil.String))
.Add(Expression.Sql("lower(Surname) like lower(?)", "%" + surname.ToLower()+ "%" , NHibernateUtil.String))
.Add(Expression.Sql("RoleID = ?", 1, NHibernateUtil.Int32))
//.Add(Expression.Eq("RoleID", 1))
.List<Person>();
}
public virtual IList<Person> SearchNew(string passportnumber, string surname )
{
var session = GetSession();
return session.CreateCriteria<Person>() .List<Person>();
}
}
//Fluent mapping for Person object
public class PersonMap : ClassMap<Person>
{
public PersonMap()
{
Id(x => x.PersonID).GeneratedBy.Increment().UnsavedValue(0);
Map(x => x.AcceptedMandate);
Map(x => x.CellurPhoneNumber );
Map(x => x.DateOfBirth);
Map(x => x.Email);
Map(x => x.FirstName);
//Map(x => x.GenderID);
Map(x => x.HomeTelephone);
Map(x => x.Initials);
Map(x => x.InvestmentAccountNumber);
Map(x => x.OccupationID);
Map(x => x.Password);
Map(x => x.SecondName);
Map(x => x.IDNumber);
Map(x => x.PassportExpiryDate);
Map(x => x.PassportNumber);
// Map(x => x.RoleID);
Map(x => x.Surname);
// Map(x => x.TitleID);
Map(x => x.WorkTelephone);
References(x => x.Role).Column("RoleID").Update().Insert().Cascade.None();
References(x => x.Title).Column("TitleID").Update().Insert().Cascade.None();
References(x => x.Status).Column("StatusID").Update().Insert().Cascade.None();
References(x => x.Gender).Column("GenderID").Update().Insert().Cascade.None();
References(x => x.CountryOfPassport).Column("CountryOfPassportID").Update().Insert().Cascade.None();
References(x => x.Address).Column("AddressID").Update().Insert().Cascade.None();
}
}
//Related object mapped to Person
//Business oject definition for Gender object related to person
public class Gender:BO<Gender>
{
public virtual int GenderID { get; protected set; }
public virtual string Name { get; set; }
public override string ToString()
{
return Name;
}
}
class GenderMap : ClassMap<Gender>
{
public GenderMap()
{
Id(x => x.GenderID).GeneratedBy.Increment().UnsavedValue(0);
Map(x => x.Name);
}
}
答案 0 :(得分：0)
if (person.PersonID > 0)
{
person.Update();
}
else
{
person.Save();
}
// BO类上缺少的else语句解决了问题:)。 //不是正确的方法，因为给定了一个Windows UI控件构造函数//接收一个Person，如下所示 //在绑定到UI之前需要重新检索对象，否则更新//插入重复记录。
public ctrlClient(Person person)
{
InitializeComponent();
this.person =(Person) person.GetObjectByKey(person.PersonID);
Create();
}